Nitrogen rate and timing effects on meadowfoam oil yield and oil-yield components

Jolliff, Gary D.; Seddigh, Majid; McGahuey, Michael L.

doi:10.1016/0378-4290(93)90054-q

Cited by 5 publications

(3 citation statements)

References 14 publications

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“…Results of this research also emphasizes the importance of flower number as a component of meadowfoam seed yield. The primary effect of N fertilizer-when applied at favorable rates and times-on meadowfoam oil yield is through increased number of open flowers, and consequently, increased seed number per area (Pearson and Jolliff, 1986;Jolliff et al, 1993). Our preliminary experiments suggest that for newly developed meadowfoam lines adjustments in seeding rates and plant spacing may play an important role in optimizing production of primary stems and flower number, and improving meadowfoam productivity (unpublished data).…”

Section: Discussionmentioning

confidence: 81%

Shading and Crop‐Cover Effects on Meadowfoam Oil Yield

et al. 1993

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Meadowfoam (Limnanthes alba Hartw. ex Benth. subsp. alba cv. Mermaid) seed yield and oil yield vary among years. Consistent high oil yield is needed to encourage profitable commercialization. Field experiments were conducted at Oregon State University in 1987-1988 and 1988-1989 on an Amity silt loam (fine-silty, mixed, mesic Argiaquic Xeric Argialboll) to test the hypothesis that light and temperature effects before the beginning of rapid elongation of stems influence oil yield through alteration of phytomass (total aboveground dry matter) development. Shade-cloth and a transparent floating crop cover were used to alter light and temperature, compared to the control. Cover early, cover early plus late, and shade treatments were applied on 22 Jan. 1988 and 24 Jan. 1989. Shade and cover early were removed 29 Mar. 1988 and 28 Mar. 1989; and cover early plus late was removed 12 April 1988 and 11 April 1989. At 2 wk after the beginning of rapid elongation of stems, shaded plants had 24% less phytomass and 28% fewer stems than the control. Shade increased open flowers 27o/o, seeds per square meter 30o/o, seed yield 35%, seed oil content 8o/o, and oil yield 47%. Cover early increased open flowers 23%, seeds per square meter 34%, seed yield 21%, seed oil content 9o/o, and oil yield 33%. Effects of cover early plus late treatment on crop growth and yield were inconsistent between years. Seed yield improvement by all treatments was associated with fewer primary stems per plant, more flowers that opened, and more seeds per square meter. Genetic manipulation and cultural practices which reduce the number of primary stems per plant and increase the number of flowers opened may lead to increases in oil yield.

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Section: Discussionmentioning

confidence: 81%

Shading and Crop‐Cover Effects on Meadowfoam Oil Yield

et al. 1993

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“…Seed oil concentration was not affected by the fertilizer treatments. In the only other reports of N applications on meadowfoam production, seed yield and seed oil concentration were reduced when fertilizer was applied at 80 kg ha 21 or more in late February compared with no fertilizer applied (Jolliff et al, 1993a(Jolliff et al, , 1993b. Nitrogen application amounts .80 kg ha 21 may cause excessive vegetative growth that adversely affects the yield components (Jolliff et al, 1993b).…”

Section: Fertilizer Treatment Effectsmentioning

confidence: 95%

“…American Society of Agronomy 677 S. Segoe Rd., Madison, WI 53711 USA Abbreviations: H1F1, herbicide plus fertilizer applied at the normal time; H1F2, herbicide applied at the normal time but without fertilizer; H1Fd, herbicide applied at the normal time with fertilizer application delayed; H2F1, fertilizer applied at the normal time without herbicide; H2F2, no herbicide or fertilizer applied; HdF1, fertilizer applied at the normal time but the herbicide application delayed; HdF2, herbicide application delayed and no fertilizer applied. concentration are reduced when N fertilizer is applied at 80 kg ha 21 or more, compared with no application of fertilizer (Jolliff et al, 1993a(Jolliff et al, , 1993b. Also, meadowfoam yields can be greatly reduced by the meadowfoam fly (Scaptomya apicalis), whose damage is increased with increasing amounts of applied N fertilizer (Panasahatham et al, 1999).…”

Section: Published Inmentioning

confidence: 99%

Conservation Practices in Western Oregon Perennial Grass Seed Systems:I. Impacts of Direct Seeding and Maximal Residue Management on Production

et al. 2006

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Rapid changes in practices used to produce perennial grass seed crops in the U.S. Pacific Northwest region and shortened lengths of time that perennial grass seed fields remain in production have increased the need for additional rotation crops that are adapted to the poorly drained soils found in western Oregon. This research was conducted at three sites to determine ways to manage meadowfoam (Limnanthes alba Hartw. ex Benth.) as a component in perennial grass seed rotation systems. Experiments were conducted in 1997, 1998, and 2001 to investigate combinations of spring-applied herbicide and N fertilizer and times of applications, direct-seeded and conventional tillage establishment methods, and previous crop residue management on meadowfoam seed yield, seed oil concentration, and oil yield. No spring-applied fertilizer or herbicide produced responses for all yield components as great as or greater than any other treatment combination. Direct-seeded meadowfoam yielded more oil than the conventional establishment treatment. There was no effect of residue management amounts from grass seed grown in the previous rotation sequence on meadowfoam production; however, maximal residue management, especially if used in combination with direct-seeded meadowfoam, should reduce annual soil erosion. Meadowfoam is suited to low-input production and is adapted to the use of conservation practices including direct seeding and maximal residue management in perennial grass seed systems.

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Meadowfoam Breeding

Kling¹

2020

Plant Breeding Reviews

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Nitrogen rate and timing effects on meadowfoam oil yield and oil-yield components

Cited by 5 publications

References 14 publications

Shading and Crop‐Cover Effects on Meadowfoam Oil Yield

Shading and Crop‐Cover Effects on Meadowfoam Oil Yield

Conservation Practices in Western Oregon Perennial Grass Seed Systems:I. Impacts of Direct Seeding and Maximal Residue Management on Production

Meadowfoam Breeding

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